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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME [Abstract]
Net earnings	$ 57,393	$ 57,917	$ 43,003
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments	2,929	1,024	(5,473)
Pension and postretirement plans	(16)	(19)	(12)
Total other comprehensive income (loss), net of tax	2,913	1,005	(5,485)
Comprehensive income	$ 60,306	$ 58,922	$ 37,518

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